Features:
Features:
17
PRODUCT SPECIFICATIONS
Parameter
Voltage* (nominal )
Pickup (close), max.
Hold, Min.
Dropout (open), min.
Current (@VsNom/ 25
o
C)
Inrush
Holding, standby,
Inrush Time, max.
COIL DATA**
CONTACT RATINGS*
28-1800 Vdc
Units
Vdc
A
A
ms
Sample Part No. EV250-2 A
Model
2 = with blowout magnets
8 = without blowout magnets
7 = 10" flying leads
(12 V, with magnets only)
Coil Voltage
A = 12 Vdc, Nominal
B = 24 Vdc, Nominal
PART NUMBER SELECTION
* Other special coil voltages available upon request.
* * Do not use a free wheeling diode or capacitor across the coil. Built in
suppression limits back EMF to zero volts
Kilovac EV250-2A & 2B - 400 Amps ("Czonka II EVX")
Make & Break Load Switching
Hydrogen dielectric for power switching high
current loads
400 A carry, 2,500 A interrupt @ 320 Vdc
Ideal for circuit protection, control, battery
switching, and main power safety disconnect
Versatile power, voltage, and current
operating range: 28-1800Vdc tested
Internal coil economizer provides:
− 4W typical hold power independent
of temperature & voltage range
− EMI spectrum tested and approved
− Built-in coil suppression
Patented "hammer effect" mechanism breaks
light contact welds
Patented hermetically "Super-sealed"
environment chamber uniquely protects ALL
moving parts
Can operate in harsh environments
Moving contact rotates to provide fresh
contact surface for low contact resistance
and low power comsumption
Sealed control connector. Mating connector
with flying leads P/N 2005 available, see
page 59
Special versions available:
− Economical (-8A/B) for light duty
power switching (without arc blowout
magnets
− 10 inch flying leads model (-7A)
* For circuit conditions and actual data refer to the EV250 hot switch study. Since each application is unique, user is encouraged to verify rating in
actual application.
EV250-2A
12
9
7
5
2.8
0.34
200
EV250-2B
24
18
14
10
1.8
0.11
200
For detailed specifications and recommenda-
tions, refer to the EV250-2A & B or 7A sales
drawings.
1
10
100
1,000
10,000
100,000
1 10 100 1,000 10,000 100,000
28Vdc
Life Cycles
Switchin
Current
270Vdc
400Vdc
600Vdc
900Vdc
1800Vdc
Re
ion of
Contact
Levitation.
Operation
Prohibited
Momentary Carry
Re
ion
400A 9000A
120Vdc
* Refer to sales drawing, qualification test plan for actual mix of precharge and break currents used on each cycle.
o
Part Number
Contact Arrangement ..........................................................
Contact Form ........................................................................
Continuous Current Carry, Max. ........................................
6.5 Minutes ....................................................................
Break Current @ 320 Vdc ...................................................
Contact Resistance, Max. ...................................................
Contact Resistance, Typ. ....................................................
Dielectric at Sea Level (leakage < 1mA) ............................
Shock, 11 ms 1/2 Sine (peak), operating .........................
Vibration, Sinusoidal (80-2000 Hz, peak) .........................
Operating Ambient Temperature Range ............................
Load Life, @ 320 Vdc. 95% Weibull* ................................
Operate Time, 25
o
C .............................................................
Close (includes bounce) Typ. ......................................
Bounce (after close only), Max. ..................................
Release Time (includes arcing), Max. @ 2500A ........
Insulation Resistance @ 500 Vdc, Min. ............................
Weight, Nominal ..................................................................
UNIT EV250-2A EV250-2B
SPST-NO SPST-NO
XX
A 400 400
A 500 500
A 2,500 2,500
ohms 0.0003 0.0003
ohms 0.0001 - 0.0002 0.0001 - 0.0002
Vrms 2,200 2,200
G's peak 30 30
G's 20 20
C -40 to +85 -40 to +85
cycles See Page 19 See Page 19
ms 18 18
ms 55
ms 15 15
Mohm 100 100
pound (kg) 1.76 (0.8) 1.76 (0.8)
Tyco Electronics / www.tycoelectronics.com / Factory Direct Technical Support: 800-253-4560, ext. 2023 (U.S., Canada, Mexico) or 805-220-2020, ext. 2023 (International)
Note: Dimensions in inches. Multiply values by 25.4 for dimensions in mm.
